Cold winter atmosphere, wearing a brown fur coat to warm the body, the concept of prestige and dignity, portrait of an old Arab Gulf Omani man wearing a dishdasha and an Omani cloak and looking at the camera with gestures of cheerfulness and pleasure, full-length body, white background
Raising the fist upwards with gestures of strength and challenge, encouraging with expressions of enthusiasm, joy in victory and triumph, portrait of an old Arab Gulf Omani man wearing the traditional Omani dishdasha and kummah raising his hand in the air with happiness and pleasure, full body, white background
Gestures of surprise and astonishment at hearing something shocking, trying to eavesdrop, poor listening ability, close-up portrait of an old Arab Gulf Omani man wearing a dishdasha and traditional Omani kummah standing straight and putting his hand behind his ear with an expression of surprise, white background
Trying to save and save, collecting money and doing monthly calculations using digital calculator, close-up portrait of an old Arab Gulf Omani man wearing traditional dishdasha, turban and glasses sitting behind office desk and collecting banknotes of various denominations in his hands, white background
Concern for appearance, concept of prestige and dignity, appreciation and respect for elderly men, portrait from behind of an old Arab Gulf Omani man wearing a dishdasha and traditional Omani kummah standing straight, full body, white background
Raising fingers in victory sign, victory, triumph, achieving goals, portrait of an elderly Arab Gulf Omani man wearing a dishdasha and a sleeve looking at the camera with gestures of happiness and pleasure, feeling strong, satisfied and at peace, full body, white background
Looking at camera with gestures of pleasure and pointing finger at something, portrait of an old Arab Gulf Omani man wearing a dishdasha and traditional Omani kummah standing straight and holding an imaginary item in his hand, interest in appearance, full body, white background
Looking somewhere absentmindedly, feeling bored, confused in making decisions and solving problems, portrait of an old Arab Gulf Omani man wearing a dishdasha and an Omani kummah and wearing glasses, putting his hand under his chin with gestures of deep thinking, full body, white background
Feeling frustrated and disappointed for losing something, closing eyes with gestures of sadness and wanting to cry, close-up portrait of an elderly Arab Gulf Omani man wearing the traditional dishdasha and Omani kummah taking off his glasses and holding his head, white background
Planning and future vision, hands on eyes and acting out the movement of the telescope, portrait of an elderly Arab Gulf Omani man wearing the traditional dishdasha and Omani kummah and looking at the camera with cheerful gestures, contemplating the realization of dreams and ambitions, full body, white background
Holding and raising hands up and cheering enthusiastically, achieving accomplishments and reaching goals and ambitions, joy in victory and triumph, portrait of an old Arab Gulf Omani man wearing a dishdasha and traditional Omani kummah looking at the camera with gestures of happiness, full body, white background
Trying to balance salary and expenses, doing monthly calculations using calculator, portrait of an old Arab Gulf Omani man wearing a dishdasha, a sleeve and glasses sitting behind a desk collecting and distributing money with gestures of thinking and frustration, full body, white background
Using modern techniques and technology to work online, high-profit online businesses, counting money and making important financial calculations, close-up portrait of an old Arab Gulf Omani man wearing a dishdasha and a cloak sitting behind an office desk with a laptop in front of him, white background
Inquiring about bills via mobile device, asking about the price of something with hopeful gestures, close-up portrait of an elderly Arab Gulf Omani man wearing a dishdasha and an Omani kummah, wearing glasses and holding paper money in his hand, making a phone call using a mobile phone, white background
Using laptop to make money through remote work, relying on modern technologies in online payment and purchase, portrait of an old Arab Gulf Omani man wearing a dishdasha and a cloak sitting behind an office desk counting money and doing calculations, full body, white background
Drop in temperature and the onset of winter weather, feeling frostbite and freezing of extremities, facial and hand movements indicate feeling of extreme cold, portrait of an old Arab Gulf Omani man wearing a dishdasha, a sleeve and a traditional fur in an attempt to warm himself, full-length body, white background
Frozen limbs and feeling of frost, falling temperatures and the onset of winter weather, facial and hand movements indicate a feeling of extreme cold, close-up portrait of an old Arab Gulf Omani man wearing a dishdasha, a traditional cloak and a fur coat in an attempt to warm himself, white background
Referring to mind and thinking wisely, personal freedom and self-confidence, portrait of an old Arab Gulf Omani man wearing the traditional Omani dishdasha and kummah standing straight and looking at the camera with gestures of pleasure and happiness, full body, white background
View of the new issue of Omani banknotes, the official currency in circulation in the markets of the Sultanate of Oman, close-up portrait of a smiling old Arab Gulf Omani man wearing the traditional dishdasha standing and holding a twenty riyal banknote with gestures of pleasure, white background
Monocular movement representation by placing hand over one eye, seeing future plans, contemplating the realization of dreams and ambitions, close-up portrait of an elderly Arab Gulf Omani man wearing the traditional dishdasha and Omani kummah and looking at the camera with gestures of pleasure, white background
Feeling tired and exhausted, suffering from a health problem, closing eyes and feeling dizzy, portrait of an old Arab Gulf Omani man wearing a dishdasha and traditional Omani kummah, putting his hand on his head with an expression of confusion and lethargy, full body, white background
Rejection and non-acceptance, signs and hand movements indicating dislike, looking at the camera with gestures of annoyance and negativity, portrait of an old Arab Gulf Omani man wearing a dishdasha and an Omani turban and wearing glasses, pointing his thumb down, full body, white background
Trying to manage household expenses wisely, using digital calculator in economic business, portrait of an elderly Arab Gulf Omani man wearing a traditional Omani dishdasha and kummah doing calculations with gestures of concentration, striving towards saving and saving, full body, white background
Financial economics, trying to manage expenses, close-up portrait of an elderly Arab Gulf Omani man wearing a dishdasha and an Omani kummah sitting behind a table holding a digital calculator in one hand and a bunch of money in the other, striving to save and save, white background
The official currency in circulation in the markets of the Sultanate of Oman, display of the new issue of Omani paper money, portrait of an old Arab Gulf Omani man wearing a dishdasha, a sleeve and eyeglasses sitting behind an office desk holding a twenty riyal banknote, full body, white background
Receiving approval but not completely satisfied, looking at camera with angry and annoyed gestures, close-up portrait of an old Arab Gulf Omani man wearing a dishdasha and an Omani kummah raising his thumb up, sign of quality and approval, white background
Trying to see distant objects, gestures of focus to get a clear view, portrait of an elderly Arab Gulf Omani man wearing the traditional dishdasha and Omani kummah, putting his hand on his forehead and looking in a certain direction, full body, white background
The concept of prestige and dignity, concern for outward appearance, appreciation and respect for elderly men, close-up portrait from the back of an old Arab Gulf Omani man wearing a dishdasha and traditional Omani kummah standing straight, white background
Sneezing, coughing and cold symptoms, catching a cold and flu, portrait of an old Arab Gulf Omani man wearing a dishdasha and an Omani turban holding a tissue in his hand to prevent the spread of infection, fatigue, exhaustion and the need for rest, the necessity of taking appropriate treatment, full-length body, white background
Feeling frustrated and disappointed for losing something, closing eyes with gestures of sadness and wanting to cry, delicate feelings and emotions, close-up portrait of an elderly Arab Gulf Omani man wearing the traditional dishdasha and Omani kummah, taking off his glasses and holding his head, white background
Loyalty to the Omani flag with feelings of pride and dignity, pride and honor in belonging to the Sultanate of Oman, portrait of an old Arab Gulf Omani man wearing the traditional dishdasha and sleeve, carrying the Omani flag and kissing it with all love, full body, white background
Thumbs up with signs of approval and quality, following precautionary measures to prevent the spread of infection, portrait of an elderly Arab Gulf Omani man wearing a dishdasha and a sleeve wearing a medical mask, taking necessary measures to prevent the Corona virus, full body, white background
Gestures of happiness hearing good news, using modern and advanced techniques and technology, portrait of an old Arab Gulf Omani man wearing a dishdasha and an Omani kummah and wearing glasses holding a mobile phone in his hand and making a phone call, full body, white background
Facial and hand movements indicate feeling very cold, cold winter weather, feeling frostbite and freezing limbs, portrait of an old Arab Gulf Omani man wearing a dishdasha and traditional Omani kummah trying to warm himself, full body, white background
Request to take your time with something, hand gesture indicating deliberation, close-up portrait of an old Arab Gulf Omani man wearing the traditional Omani dishdasha and kummah standing straight and looking at the camera with gestures of pleasure and cheerfulness, white background
Doing monthly calculations using digital calculator, collecting money and trying to save and save, portrait of an old Arab Gulf Omani man wearing a dishdasha, a sleeve and glasses sitting behind an office table and collecting banknotes in his hands, full body, white background
Extending hands forward in an attempt to defend oneself, portrait of an elderly Arab Gulf Emirati man wearing a kandura and ghutra looking at the camera with gestures of terror and awe, leaving a safe distance and asking to stop, panic and fear of something, white background
Panic and fear of something, hands extended forward in an attempt to defend oneself, panic and request to stop and leave a safe distance, close-up portrait of an old Arab Gulf Omani man wearing a dishdasha, a sleeve and glasses and looking at the camera with gestures of terror and awe, white background
Raising hands up in gestures indicating acceptance and excellence, portrait of an old Arab Gulf Omani man wearing a dishdasha and an Omani kummah looking at the camera with gestures of cheerfulness and pleasure, full quality mark, highly appreciated, full body, white background
Gestures of extreme discomfort and suffering, portrait of an elderly Arab Gulf Omani man wearing a dishdasha and a turban, putting his hands around his neck in an attempt to strangle himself, suffocation and feeling of tightness, killing oneself to escape from problems, worries and surrounding pressures, full body, white background
A hand movement means lowering the volume and calming down, facial and hand gestures indicating an attempt to calm a heated discussion, a portrait of an Arab Gulf Omani man wearing a dishdasha and a cuff, showing signs of annoyance and discomfort, the way to ask politely and respectfully, an orange background.
Pointing finger at something with gestures of pleasure, portrait of an old Arab Gulf Omani man wearing a traditional Omani dishdasha and kummah standing straight and holding an imaginary item in his hand, concern for appearance, full body, white background
Severe headache, facial and hand gestures indicating pain, portrait of an Arab Gulf Omani man wearing a dishdasha and a turban, pointing to his head with gestures of illness, headache, and need for treatment and rest, gray background
The concept of caring about one's appearance, elegance and personal hygiene, looking at the camera with expressions of happiness and pleasure, a portrait of two young Gulf Arab Omani men wearing a dishdasha and a kummah, showing signs of happiness, full-length body, white background
The onset of winter weather and the drop in temperature, feeling frostbite and freezing of the extremities, facial and hand movements indicate a feeling of extreme cold, portrait of an old Arab Gulf Omani man wearing a dishdasha, a sleeve and a traditional fur coat in an attempt to warm himself, full-length body, white background
Request to stop talking and order to be silent, portrait of an elderly Arab Gulf Omani man wearing a dishdasha and a sleeve, putting his index finger in front of his mouth and looking at the camera with serious and angry gestures, facial and hand movements indicating a prohibition on talking, full body, white background
Greeting through mobile phone screen, making video call via mobile device, portrait of an Arab Gulf Emirati man wearing kandura and ghutra using mobile phone, communicating with family and friends and hearing their news, full body length, white background
Regret for losing something valuable, disappointment, betrayal and shock, frustration and sadness for lost opportunity, close-up portrait of an old Arab Gulf Omani man wearing a dishdasha, a turban and glasses, putting his hands behind his head with expressions of regret and remorse, white background
Looking at the camera with gestures of happiness and pleasure, raising something in one hand and pointing at it with the other, portrait of an old Omani Arab man wearing a dishdasha and a sleeve pointing with his finger at an item, expressions of joy and satisfaction, white background
Bending over due to back and spine pain, arthritis pain, muscle strain and fatigue, portrait of an old Arab Gulf Omani man wearing the traditional Omani dishdasha and kummah and holding his back in pain, need for rest and treatment, full body, white background
Online payment and purchase using modern technologies, making money using a laptop through remote work, portrait of an old Arab Gulf Omani man wearing a dishdasha and a cloak sitting behind an office desk counting money and doing calculations, full body, white background
Bringing the palms together in front of the chest to pray, gestures of supplication and supplication, asking for help from God Almighty, a portrait of an old Omani man wearing a dishdasha and a sleeve, praying and asking for forgiveness, white background.
Seeing distant objects using a telescope, love of adventure and exploration, planning for future goals, portrait of an elderly Arab Gulf Omani man wearing the traditional dishdasha and Omani kummah, placing his hand on his forehead and looking through binoculars, full body, white background
The necessity of taking medication to recover from illness, abdominal constipation and feeling colic pain, portrait of an elderly Arab Gulf Omani man wearing a dishdasha and a sleeve, putting his hands on his stomach with gestures of disturbance and discomfort, the importance of visiting a doctor and getting some rest, full-length body, white background
Gum disease and oral inflammation, suffering from tooth decay, need to visit dental clinic, close-up portrait of an old Arab Gulf Omani man wearing a dishdasha and an Omani kummah, putting his hand on his cheek and closing his eyes with gestures of severe pain, white background
Standing with crossed hands gestures straight indicating self-confidence, portrait of a young Arab Gulf Omani man wearing a dishdasha and a sleeve, showing expressions of happiness and joy, interest in elegance and external appearance, full-length body, white background
Severe headache, facial and hand gestures indicating pain, portrait of an Arab Gulf Omani man wearing a dishdasha and a turban, pointing to his head with gestures of illness, headache, and need for treatment and rest, gray background
Hand and face movements expressing shyness, gestures that suddenly remember something, close-up portrait of an old Arab Gulf Omani man wearing a dishdasha and traditional Omani kummah standing straight and covering his eyes with his hand, concern for outward appearance, white background
Looking at the camera, gestures of self-confidence, expressions of happiness and pleasure, portrait of an Omani Gulf Arab man wearing a dishdasha and turban raising his hands in a finger-touching motion, the concept of intelligence and knowledge, full-length body portrait, gray background
Looking at the camera with gestures of happiness and pleasure, expressions of walking and walking to go somewhere, full-length body image, concept of elegance and interest in external appearance, portrait of a young Arab Gulf Omani man wearing a dishdasha and a cloak standing straight, colored background
Benefiting from the experiences of the elderly and exchanging dialogue and questions, training courses and workshops, giving lectures and holding seminars, close-up portrait of an old Arab Gulf Omani man wearing a dishdasha, a sleeve and glasses, holding a loudspeaker in his hand and conducting important discussions, white background
A hand movement means lowering the volume and calming down, facial and hand gestures indicating an attempt to calm a heated discussion, a portrait of an old Omani Arab man wearing a dishdasha and a cuff, showing signs of annoyance and discomfort, the way to ask politely and respectfully, a white background.
Self-confidence and standing up straight, concern for appearance, concept of masculinity and dignity, portrait of an elderly Arab Gulf Omani man wearing the traditional dishdasha, Omani kummah and glasses, looking at the camera with gestures of pleasure and cheerfulness, full body, white background
Highly applauded, standing and looking at camera with gestures of happiness and pleasure, portrait of an old Arab Gulf Omani man wearing a dishdasha and an Omani kummah raising his thumb up, sign of quality and acceptance, full body, white background
Economic renaissance in the Sultanate of Oman, display of the new issue of Omani banknotes, the official currency in circulation in the country's markets, close-up portrait of an old Gulf Arab Omani man wearing the traditional dishdasha standing and holding banknotes of several denominations, white background
Gestures of rapture and singing, singing along to the melodies of songs, a portrait of an old Omani man wearing a dishdasha and a sleeve, showing signs of joy and pleasure, smiling and entering into the atmosphere of music, a white background.
Stop talking and lower the volume, portrait of an Omani Gulf Arab man wearing a turban and dishdasha and placing his index finger on his mouth, calm and stillness and not disturbing, facial and hand gestures indicating a request for silence and silence, full-length body portrait, gray background
Hard work and completion of required tasks, following movies and series, browsing social media, side portrait of an Arab Gulf Omani man wearing a dishdasha and a cloak, standing and holding a laptop in his hand, using modern technologies and working remotely, full body length, white background
Wearing traditional Omani Arab costumes, caring about elegance and appearance, the concept of masculinity and self-confidence, portrait of a smiling Omani Gulf Arab man wearing a dishdasha and a kummah looking at something with gestures of pleasure and happiness, full-length body image, white background
Discussion and dialogue on a topic, taking notes and reviewing information, portrait of two young Gulf Arab Omani men wearing dishdasha and kummah, expressions of joy and happiness appear on them, concept of seriousness and diligence in work, white background
Facial gestures indicating excessive enthusiasm, a portrait of an old Omani Arab man wearing a dishdasha and a cuff, raising his hand up for encouragement, expressions of joy and happiness, pride and feeling happy for accomplishing something, white background.
Back and spine pain, arthritis pain, muscle strain, fatigue and exhaustion, close-up portrait of an old Arab Gulf Omani man wearing a traditional Omani dishdasha and kummah standing and holding his back in a hunched position and pain, need for rest and appropriate treatment, white background
Expressions of panic and fear of something, extending the hands forward in an attempt to defend oneself, a portrait of an old Omani Arab man wearing a dishdasha and a cuff, showing signs of terror, gestures indicating a request for help and rescue, a white background.
Facial gestures indicating excessive enthusiasm, a portrait of an old Omani Arab man wearing a dishdasha and a cuff, raising his hand up for encouragement, expressions of joy and happiness, pride and feeling happy for accomplishing something, white background.
Signs and hand gestures indicating dislike, rejection and non-acceptance, looking at the camera with gestures of annoyance and negativity, close-up portrait of an old Arab Gulf Omani man wearing a dishdasha and an Omani turban and wearing glasses, pointing his thumb down, white background
Perfect quality mark, hands raised upwards in gestures indicating acceptance and excellence, portrait of an old Arab Gulf Omani man wearing a dishdasha and an Omani kummah looking at the camera with gestures of cheerfulness and pleasure, highly applauded, full body, white background
Hand gesture indicating handshake, greeting and greeting, meeting for business purposes, portrait of two young Gulf Arab Omani men wearing dishdasha and kummah meeting each other with expressions of joy and happiness, kindness and sophistication in dealing with others, white background
Sudden heart attack, angina pain, feeling a stabbing sensation in the chest and heart, close-up portrait of an old Arab Gulf Omani man wearing a dishdasha and traditional Omani kummah, putting his hand on his heart with gestures of pain and suffering, white background
Hand gestures and signs indicating choice and pointing to a person, readiness to write and specify something, concept of education according to the prescribed curricula, recording and taking notes, close-up portrait of an Arab Gulf Omani teacher wearing a dishdasha and a sleeve holding a pen in his hand, white background
Yawning and the desire to sleep, placing the hand over the mouth indicates a feeling of sleepiness, a portrait of an old Omani man wearing a dishdasha and a cuff, showing signs of sleepiness, facial expressions indicating fatigue and lack of resistance, a white background.
Chat with family and friends, facilitating communication with others using the mobile phone, technical and technological developments, portrait of an Omani man wearing a dishdasha and turban having a conversation with relatives via mobile phone, full-length body photo, gray background
Growth and renaissance of the Omani economy, looking at the camera with gestures of happiness and pleasure, portrait of an elderly Gulf Arab Omani man wearing a dishdasha, an Omani turban and glasses, holding a green plant in the middle of paper money in his hands, full body, white background
Feeling sad, frustrated and disappointed, sensitive feelings and emotions, being affected by an event and crying over it, close-up portrait of an elderly Arab Gulf Omani man wearing the traditional dishdasha and Omani kummah, taking off his glasses and wiping his tears, white background
The concept of technical and technological developments, a portrait of an old Omani Arab man wearing a dishdasha and a cuff, displaying a blank black screen on a mobile phone, keeping pace with modern progress, a white background.
Highly applauded, standing and looking at camera with gestures of happiness and pleasure, portrait of an old Arab Gulf Omani man wearing a dishdasha and an Omani kummah raising his thumb up, sign of quality and acceptance, full body, white background
Raising hands to show strength and display muscles, portrait of an elderly Arab Gulf Omani man wearing a dishdasha and a kimono looking at the camera with serious gestures, exercising regularly to maintain a healthy body, enjoying fitness and a strong physique, full body, white background
Signs of victory and triumph, portrait of an Arab Gulf Omani man wearing a dishdasha and a cloak, raising his hand up with gestures of pride, expressions of joy, pleasure and happiness for accomplishing something important, gray background
Reliance on the medical stick to improve the quality of life of the elderly, use of walking and mobility aids, portrait of an old Arab Gulf Omani man wearing the dishdasha and the Omani kummah, leaning on his crutch to move from one place to another, full-length body, white background
The concept of elegance and attention to external appearance, a portrait of a young Arab Gulf Omani man wearing a dishdasha and a cuff, standing and looking with gestures of happiness and pleasure, expressions of walking and walking to go somewhere, standing and looking forward, full-length body portrait, orange background.
Looking at the camera with gestures of pleasure, economic renaissance in the Sultanate of Oman, display of the new edition of the official Omani currency in circulation in the country, portrait of an old Arab Gulf Omani man wearing a dishdasha and a kummah standing and holding banknotes of several denominations, full body, white background
Hand gestures and movements indicating holding something, specifying a certain quantity or distance, close-up portrait of an Arab Gulf Omani man wearing a dishdasha raising his hand up with gestures of lifting and carrying a specific item, white background
Yawning, lethargy and need to sleep, feeling tired and exhausted and needing to take a break, portrait of an old Arab Gulf Omani man wearing a dishdasha, an Omani turban and glasses, putting his hand in front of his mouth with gestures of drowsiness and laziness, full body, white background
Facial expressions indicating the occurrence of some calamity, a portrait of an old Omani Arab man wearing a dishdasha and a sleeve, placing his hand on his head, showing signs of confusion and falling into trouble, inability to hold the reins and loss of control, white background.
The official currency in circulation in the markets of the Sultanate of Oman, display of the new issue of Omani paper money, portrait of an old Arab Gulf Omani man wearing a dishdasha, a sleeve and eyeglasses, standing and holding a twenty riyal banknote with gestures of pleasure, full body, white background
Gestures of suddenly remembering something, hand and face movements expressing shyness, portrait of an old Arab Gulf Omani man wearing a dishdasha and traditional Omani kummah standing straight and covering his eyes with his hand, concern for external appearance, full body, white background
Concern about one's appearance, gestures of confidence, portrait of an elderly Gulf Arab Omani man wearing the traditional dishdasha and Omani kummah, placing his hand on his forehead and looking at the camera with an expression of joy and pleasure, full body, white background
Participation in the accomplishment of work, the concept of work and diligence, a portrait of an Omani young man wearing a dishdasha and a kummah holding a laptop in his hand and another Saudi man showing signs of joy and happiness, full-length body, cultural exchange between Arab countries, white background
Discussion and dialogue on a topic, taking notes and reviewing information, portrait of two young Gulf Arab Omani men wearing dishdasha and kummah, expressions of joy and happiness appear on them, concept of seriousness and diligence in work, white background
Concept of engineering and architectural construction, determining a specific location, working in the engineering sector, hand signals indicating this place (here), close-up portrait from the side of an Arab Gulf Omani engineer wearing a dishdasha, a sleeve and a protective vest, raising his index fingers and pointing to something, white background
Feeling annoyed and wanting revenge, blaming, scolding and accusing, asking to stop doing wrong, portrait of an Arab Gulf Omani man wearing a dishdasha, a sleeve and protective gloves raising his index finger up to identify someone (you), full body image, white background
Expressions of joy and happiness, using advanced devices and modern technologies to accomplish work, portrait of two young Gulf Arab Omani men wearing a dishdasha and a kummah sharing a work table, showing signs of happiness, white background
Hand gestures and signs indicating this place (here), specifying a specific location with gestures of pleasure and cheerfulness, portrait of an Arab Gulf Omani man wearing a dishdasha and turban pulling a handcart to transport luggage, standing straight and looking at the camera, full-length body image, gray background.
Expressions of astonishment when seeing something, gestures of joy and pleasure, looking at something from afar, portrait of an old Omani man wearing a dishdasha and a cuff, showing happiness, placing his hands on either side of the face and trying to clarify the vision, white background
A hand movement indicating a request for help and assistance, extending the palms forward to indicate need, a portrait of an old Omani man wearing a dishdasha, a cuff, and medical glasses, the traditional dress for men in the Sultanate of Oman, gestures of helplessness and hope, white background.
Expressions of panic and fear of something, hands extended forward in an attempt to defend oneself, portrait of an Arab Omani man wearing a dishdasha and a sleeve showing signs of terror, gestures indicating a request for help and rescue, gray background
The concept of caring about one's appearance, elegance and personal hygiene, looking at the camera with expressions of happiness and pleasure, a portrait of two young Gulf Arab Omani men wearing a dishdasha and a kummah, showing signs of happiness, full-length body, white background